HYAUNA. 



3T 



Hist. Ill, 434, pi. xxi, f. 2 (1840) ; Terr. Moll. U. S. II, 219, pi. xxs, 

 f. 3.— Pfeiffeu, Mon. Hel. Viv. I, 113; IV, 85.— W. G. Binney, T. 

 M. IV, 100. 

 Pseudoluialina limatula, Tkyon, Am. Journ. Conch. II, 264, pi. iv, f. 65 

 (1866). 



From New York to Michigan ; also in Indiana. 



Hyalina dliranlls, Newcomb. — Shell widely umbilicated, de- 

 j5res.sed, discoidal, of a dead white or greenish color, thin, with very 

 coarse, rough stride ; wliirls four, flattened, the last dis- 

 coidal, not descending at the aperture, below broadly ex- ^''S- ■*■'• 

 cavated and channelled ; suture delicate ; aperture removed 

 from tlie axis, transversely rounded ; peristome simple, 

 acute, its terminations approaching, joined by callus, that 

 of the columella not reflected. Greater diam. 4, height 1^ 

 mill. 



Helix duranii, Newcomb, Proc. Cal. Acad. Nat. Sci. Ill, 



118 (1864). 

 Patula dwanti, Tryon, Am. JoUrn. Conch. II, 263, pi. iv, 



f. 53 (1866). 



Santa Barbara Island, California. 



Cat. No. 



No. of Sp. 



9,347 



Locality. 



From whom received. 



Sta. Barbara Isl., Cal. 



Dr. J. G. Cooper. 



Type. 



Fig. 50. 



Hyalina lUinuscilla, Bixney.— Shell umbilicated, minute, de- 

 pressed-convex ; epidermis whitish ; wliirls four, convex, not increasing 

 rapidly in diameter, with microscopic wrinkles ; suture very 

 distinctly impressed; aperture nearly' circular; peristome 

 thin, acute ; umbilicus large, not spread, deep, and exhibiting 

 the volutions ; base rounded, columella with a thin callus. 

 Greater diam. 2.J, lesser 2J ; height 1 mill. 



ffelix mimiscula, Binney, Bost. Journ. Nat. Hist. Ill, 435, pi. 

 xxii, f. 4 (1840); Terr. Moll. 11, 221, pi. xvii, a, f. 2, 

 excl. syn.— Adams, Vermont Mollusca, 161 (1842). — 

 Chemnitz, 2d ed. II. 112, tab. Ixxxv, f. 20-23.— Pfeiffer, 

 Symbol. 11, 33; Mon. I. 114.— Reeve, Con. Icon. 731 (1852).— W. 

 G. Binney, T. M. IV, 102.— Mobse, Amer. Nat. I, 543, f. 35 (1867). 



